Gaya APA

Djusma, A, W, M, B, J, M, S. (2008). English in Focus:for Grade IX Junior High School (SMP/MTs) . Jakarta: Pusat Perbukuan, Departemen Pendidikan Nasional.

Gaya MLA

Djusma, Artono, Wardiman;, Masduki, B., Jahur;, M., Sukirman. "English in Focus:for Grade IX Junior High School (SMP/MTs)". Jakarta: Pusat Perbukuan, Departemen Pendidikan Nasional, 2008. Text.